android 纯c/c++开发

2025-04-07 22:20:42

android 自ndk r8出来以后，就开始支持纯c/c+陴鲰芹茯+开发，android 的纯 c/c++ 开发更有些想 win32 开发，只不过是 WinMain 变成了 andro足毂忍珩id_main, 消息处理函数变成了两个，下面开始详细的介绍如何进行纯 c/c++开发，里面附带一个多点触屏的例子，希望对大家有用，谢谢！代码视频的百度云链接：http://pan.baidu.com/s/1qWx3W1u 密码：i9rs 方便他人亦是方便自己，如果觉得还行就点下右边的投票吧，这样可以帮助其他人更快的找到解决问题的方法；有疑问的也可留言哦，谢谢！注：由于优酷对视频进行了压缩，特将高清版放到百度云，欢迎大家学习

http://player.youku.com/player.php/sid/XNzU5MTg1Nzc2/v.swf

工具/原料

win7 x64

jdk1.8.0_11

adt-bundle-windows-x86_64-20140702

android-ndk-r10

新建一个Natvie工程

1、打开eclipse；

2、打开菜单->File->New->Android Application；

3、设置工程名，sdk版本，注意：主题设置为 None，点击next；

4、Configure Project 是取消 Create activity 的复选框，点击next；

5、Configure the attributes of the icon set，直接点击 next；

6、Select whether to create an activity, and if so, what kind of activity. 点击 finish即可；

7、工程便创建出来了

配置Makefile

1、右键工程NativeTest->弹出菜单->Android Tools->Add Native Support...

2、Settings for generated native components for project.界面直接点击Finish

3、将 android.mk 的内容补充完整：LOCAL_PATH := $(ca盟敢势袂ll my-dir)include $(CL呶蓟鹭毵EAR_VARS)LOCAL_MODULE := NativeTestLOCAL_SRC_FILES := NativeTest.cppLOCAL_LDLIBS := -llog -landroidLOCAL_STATIC_LIBRARIES := android_native_app_glueinclude $(BUILD_SHARED_LIBRARY)$(call import-module,android/native_app_glue)

4、增加一个Application.mk 文件（这一步可选），并写入：APP_ABI := x86APP_CPPFLAGS := --std=c++11NDK_TOOLCHAIN_VERSION := 4.8

代码部分

1、android_main：这个函数类似于win32开发的WinMain函数2、app->o荏鱿胫协nAppCmd = onAppCmd; app->onInputEvent = onInputEvent; 类似于win32中设置窗口的回掉函数3、while ((ident=ALooper_pollAll(-1, NULL, &events, (void**)&source)) >= 0) { // Process this event. if (source != NULL) { source->process(app, source); } // Check if we are exiting. if (app->destroyRequested != 0) { return; } }这一段类似于win32的消息循环4、为了方便大家粘贴，android_main 函数的代码如下：void android_main(struct android_app* app) { // Make sure glue isn't stripped. app_dummy(); app->onAppCmd = onAppCmd; app->onInputEvent = onInputEvent; while (1) { int ident; int events; struct android_poll_source* source; while ((ident=ALooper_pollAll(-1, NULL, &events, (void**)&source)) >= 0) { // Process this event. if (source != NULL) { source->process(app, source); } // Check if we are exiting. if (app->destroyRequested != 0) { return; } } }}

2、onAppCmd 描述的是真个a罕铞泱殳ctivity的生命周期，类似于win32开发的消息处理回掉函数：static void onAppCmd(struct android_app* app, int32_t cmd) { switch (cmd) { case APP_CMD_SAVE_STATE: // The system has asked us to save our current state. Do so. __android_log_print(ANDROID_LOG_DEBUG, "fuke", "engine_handle_cmd APP_CMD_SAVE_STATE"); break; case APP_CMD_INIT_WINDOW: // The window is being shown, get it ready. __android_log_print(ANDROID_LOG_DEBUG, "fuke", "engine_handle_cmd APP_CMD_INIT_WINDOW"); break; case APP_CMD_TERM_WINDOW: __android_log_print(ANDROID_LOG_DEBUG, "fuke", "engine_handle_cmd APP_CMD_TERM_WINDOW"); break; case APP_CMD_GAINED_FOCUS: // When our app gains focus, we start monitoring the accelerometer. __android_log_print(ANDROID_LOG_DEBUG, "fuke", "engine_handle_cmd APP_CMD_GAINED_FOCUS"); break; case APP_CMD_LOST_FOCUS: // When our app loses focus, we stop monitoring the accelerometer. // This is to avoid consuming battery while not being used. __android_log_print(ANDROID_LOG_DEBUG, "fuke", "engine_handle_cmd APP_CMD_LOST_FOCUS"); break; }}

3、onInputEvent 主要是用来触屏相关事件，也类似于win32开发的消息处理回掉函数，函数有两部分组成：1、检测多点触屏，并通过logcat打印出多点触屏的信息；2、控制屏庇扳隘醐幕颜色变化，每次松开手时颜色变化3、为方便大家粘贴，onInputEvent函数的代码记录如下：static int32_t onInputEvent(struct android_app* app, AInputEvent* event) { if (AInputEvent_getType(event) == AINPUT_EVENT_TYPE_MOTION) { int nNum = AMotionEvent_getPointerCount(event); char szTrace[1024] = {0}; sprintf (szTrace, "engine_handle_input num=[%d]", nNum); for (int nIdx = 0; nIdx < nNum; nIdx++) { int nX = AMotionEvent_getX(event, 0); int nY = AMotionEvent_getY(event, 0); sprintf (strrchr(szTrace, 0), " (%d %d)", nX, nY); } __android_log_print(ANDROID_LOG_DEBUG, "colorspace", "%s", szTrace); if (AKeyEvent_getAction(event) != AKEY_EVENT_ACTION_UP) return 1; ANativeWindow_Buffer nativeWindow = {0}; int nRet = ANativeWindow_lock(app->pendingWindow, &nativeWindow, NULL); int nArea = nativeWindow.width * nativeWindow.height; unsigned long* pdwScreen = (unsigned long*)nativeWindow.bits; static int s_nClr = 0; unsigned long pdwClr[] = { 0x00000000, 0x000000ff, 0x0000ffff, 0x0000ff00, 0x00ffff00, 0x00ff0000, 0x00ff00ff, 0x00ffffff}; s_nClr ++; if (s_nClr > sizeof(pdwClr) / sizeof(unsigned long)) s_nClr = 0; for (int nIdx = 0; nIdx < nArea; nIdx++) { pdwScreen[nIdx] = pdwClr[s_nClr]; } ANativeWindow_unlockAndPost(app->pendingWindow); return 1; } return 0;}